How to use the "return" in Arduino

In Arduino, the "return" statement is used within functions to send a value back to the calling code. Here's how you can use it:

1. Define a function that has a return type. For example:

int addNumbers(int a, int b) {
  int sum = a + b;
  return sum;
}

2. Inside the function, use the "return" keyword followed by the value you want to send back. In this case, the sum of the two numbers.

3. To use the returned value in your main code, assign it to a variable or directly use it. For example:

int result = addNumbers(5, 3);
Serial.println(result);

Here, the function `addNumbers()` returns the sum of 5 and 3, which is then printed to the serial monitor using `Serial.println()`.

You can change the return type of the function based on your requirement (`int`, `float`, `char`, etc.). Just make sure to match the return type in the function definition and when assigning the returned value.